I came across a post by @conboy recently about Community Annotation Challenges. I had been wondering about something similar recently both for annotations and observation fields. Adding these would be good to increase the value of data on iNaturalist. There is a tutorial on Using Identify to Annotate Observations. I’m not sure how much information there is about the various observation fields. The only one I’ve added to other people’s observations is roadkill.
I’m guessing there are a few people on iNaturalist who would like assistance annotating certain groups or adding observation fields. Maybe you’re editing regional atlas, maybe you’re doing some research, maybe you’d like nice graphs on your favourite taxa. How about creating a post with what you want annotated and any guidance that might be needed? I think conboy’s post above does this well for Monarchs. I’ve made this post a wiki (thanks tiwane) so if you create a challenge then you can add it to the list below. If there are a few then maybe we can add it to the ways to help out on iNat wiki.